公开(公告)号：AR050157A1

公开(公告)日：2006-10-04

申请号：ARP050102272

申请日：2005-06-02

Applicant: QUALCOMM INC

Inventor： SCHIFF LEONARD N ,  JALALI AHMAD ,  SHI WEI

IPC: H04B7/185

Abstract: Métodos y aparatos para la provision de una comunicacion de acceso multiple ortogonal en el enlace de retorno de un sistema de comunicacion satelital. En una realizacion se puede desarrollar un control de bucle cerrado de un parámetro de transmision asociado a senales de transmision. Sumado a ello, se monitorea los cambios de movimiento de una terminal de manera tal que se lleva a cabo un control de bucle abierto de un parámetro de transmision si el cambio detectado alcanza un umbral determinado. Por ejemplo, si se detecta un movimiento abrupto o repentino se lleva a cabo un control abierto.

公开(公告)号：CA2585239A1

公开(公告)日：2006-03-09

申请号：CA2585239

申请日：2005-08-25

Applicant: QUALCOMM INC

Inventor： JALALI AHMAD

IPC: H04L27/26

公开(公告)号：BR0110002A

公开(公告)日：2006-02-07

申请号：BR0110002

申请日：2001-04-13

Applicant: QUALCOMM INC

Inventor： JALALI AHMAD ,  ESTEVES EDUARDO A S ,  SINDHUSHAYANA NAGABHUSHANA T ,  BLACK PETER J ,  ATTAR RASHID A

IPC: H04L1/16 ,  H04L1/18 ,  H04Q7/38

Abstract: A method for wireless communication, comprising: receiving data in multiple forward link timeslots; determining a quality metric of the received data; requesting retransmission of the data via a first request scheme if the quality metric indicates the data has not been received correctly; and if retransmission is requested and the data is not received correctly, requesting retransmission of the data via a second request scheme.

公开(公告)号：CA2559238A1

公开(公告)日：2005-09-22

申请号：CA2559238

申请日：2005-03-08

Applicant: QUALCOMM INC

Inventor： FERNANDEZ-CORBATON IVAN JESUS ,  ANTONIO FRANKLIN PETER ,  JALALI AHMAD ,  SCHIFF LEONARD NORMAN

IPC: H04W74/04 ,  H04B1/707

Abstract: Systems, methods and apparatus for configuring and accessing a random access channel in a CDMA communication system are disclosed. The number of users supported by a random access channel can be optimized by assigning a distinct time of arrival to each of a plurality of users. Each of the users can be time synchronized and can transmit data at a time that compensates for a propagation delay to allow the data to arrive at the destination receiver at the assigned time. In a CDMA system, each of the users can transmit data that is spread with the same spreading code, provided the cross correlation properties of the code are sufficient to allow identification of a source that is time offset relative to another user. The time of arrival can be determined based on the number of active users, and can be assigned as often as each transmission by each user.

公开(公告)号：HK1068741A1

公开(公告)日：2005-04-29

申请号：HK05100847

申请日：2003-02-21

Applicant: QUALCOMM INC

Inventor： JALALI AHMAD

IPC: H04B20060101 ,  H04B7/26 ,  H04B7/06

Abstract: In a CDMA data communication system capable of variable rate transmission, utilization of beamforming techniques decreases the average interference caused by transmissions of a base station (104) to subscriber stations (112) in neighboring cells (124). Base stations (102, 104) utilize multiple transmit antennas (106, 108), each transmitting signals at controlled phases, to form transmit signal beams (110, 118, 122) corresponding to individual subscriber stations (112, 116, 114). Data and reference signals are transmitted along beams (110, 118, 122) that change according to fixed time slots and subslots in order to maximize carrier-to-interference ratios (C/I) measured at subscriber stations (112, 116, 114).

公开(公告)号：HK1068739A1

公开(公告)日：2005-04-29

申请号：HK05100845

申请日：2003-02-21

Applicant: QUALCOMM INC

Inventor： JALALI AHMAD

IPC: H04B7/26 ,  H04B20060101 ,  H04B7/06

Abstract: In a CDMA data communication system capable of variable rate transmission, utilization of beamforming techniques decreases the average interference caused by transmissions of a base station (104) to subscriber stations (112) in neighboring cells (124). Base stations (102, 104) utilize multiple transmit antennas (106, 108), each transmitting signals at controlled phases, to form transmit signal beams (110, 118, 122) corresponding to individual subscriber stations (112, 116, 114). Data and reference signals are transmitted along beams (110, 118, 122) that change according to fixed time slots and subslots in order to maximize carrier-to-interference ratios (C/I) measured at subscriber stations (112, 116, 114).

公开(公告)号：BR0210559A

公开(公告)日：2004-10-05

申请号：BR0210559

申请日：2002-06-17

Applicant: QUALCOMM INC

Inventor： JALALI AHMAD ,  SMEE JOHN E ,  WALLACE MARK

IPC: H04J11/00 ,  H04J3/00 ,  H04J99/00 ,  H04L1/00 ,  H04L1/06 ,  H04L5/22 ,  H04L25/02 ,  H04L25/03 ,  H04Q7/28 ,  H04L27/26

Abstract: A method of wireless communication is disclosed, the method comprising transmitting at least one pilot reference from a plurality of antennas of a base station; receiving, at the base station, calibration information for a forward link from a terminal responsive to the at least one pilot reference; determining, at the base station, calibration information for a reverse link based upon signals transmitted from the terminal; and generating a calibration function for transmission to the terminal based upon the calibration information for the forward link and calibration information for the reverse link.

公开(公告)号：HK1056805A1

公开(公告)日：2004-02-27

申请号：HK03109155

申请日：2003-12-16

Applicant: QUALCOMM INC

Inventor： JALALI AHMAD ,  WALTON JAY R ,  WALLACE MARK

IPC: H04J11/00 ,  H04B7/06 ,  H04L1/00 ,  H04L1/06 ,  H04L5/02 ,  H04L12/801 ,  H04L12/851 ,  H04L27/26

Abstract: Transmitter and receiver units for use in an OFDM communications system and configurable to support multiple types of services. The transmitter unit includes one or more encoders, a symbol mapping element, and a modulator. Each encoder receives and codes a respective channel data stream to generate a corresponding coded data stream. The symbol mapping element receives and maps data from the coded data streams to generate modulation symbol vectors, with each modulation symbol vector including a set of data values used to modulate a set of tones to generate an OFDM symbol. The modulator modulates the modulation symbol vectors to provide a modulated signal suitable for transmission. The data from each coded data stream is mapped to a respective set of one or more "circuits".; Each circuit can be defined to include a number of tones from a number of OFDM symbols, a number of tones from a single OFDM symbol, all tones from one or more OFDM symbols, or some other combination of tones. The circuits can have equal size or different sizes. Different circuits can be used for full rate data (e.g., active speech) and low rata data (e.g., silence periods).

公开(公告)号：AU2003280502A1

公开(公告)日：2004-01-19

申请号：AU2003280502

申请日：2003-07-01

Applicant: QUALCOMM INC

Inventor： JALALI AHMAD ,  STEENTRA JACK

IPC: H04B11/00 ,  H04L9/32 ,  H04L27/26 ,  H04K1/10

Abstract: An apparatus and method for communication using sound waves is disclosed. More particularly, orthogonal frequency division multiplexing scheme is used to transmit and receive digital data on sound waves. In one embodiment, the sound waves are used to exchange information. In another aspect, the sound waves are used to authenticate an individual or device.

公开(公告)号：BR0109693A

公开(公告)日：2004-01-13

申请号：BR0109693

申请日：2001-03-20

Applicant: QUALCOMM INC

Inventor： WALLACE MARK ,  WALTON JAY R ,  JALALI AHMAD

IPC: H04J11/00 ,  H04B1/707 ,  H04B7/06 ,  H04B7/08 ,  H04B7/12 ,  H04B7/26 ,  H04B17/00 ,  H04J99/00 ,  H04L25/02 ,  H04L27/26 ,  H04W52/08 ,  H04W52/42

Abstract: The invention relates to a method for transmitting pilot signals used for measuring and reporting channel state information, CSI, in a multiple input/multiple output, MIMO, system, comprising: generating a pilot sequence by using a maximal-length shift register sequence, m-sequence; assigning a different shift to multiple transmit antennas, wherein the value of the shift is dependent on at least one characteristic of the communication channel; generating a pilot signal at each transmit antenna by shifting the pilot sequence by the value specified by the shift; and transmitting the pilot signal via the transmit antenna.